Echocardiography of the aortic root.
D001013:Aorta, Thoracic / Q000033:anatomy & histology*; D001021:Aortic Valve / Q000033:anatomy & histology / Q000502:physiology*; D004452:Echocardiography; D006801:Humans; D008722:Methods; D008943:Mitral Valve / Q000502:physiology; D014159:Transducers; D014463:Ultrasonography